WHAT'S INSIDE: NORTH AMERICA
- United States
Colorado, one of the states in the west-central United States. It is crossed by the snowcapped Rocky Mountains and is sometimes called the “Top of the Nation,” because its mean (average) elevation—6,800 feet (2,073 m)—is the highest of any state.
Arizona, one of the states of the southwestern United States. A dry land of great natural beauty, it consists largely of high plateaus and mountains, deep canyons, and colorful deserts.